Overview: 7 questions will be solved this time.Among them
           ☆7 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 36-20
    Solution:
    36-20 = 16
    Column vertical calculation:

			3	6
➖			2	0
			1	6

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 94-51
    Solution:
    94-51 = 43
    Column vertical calculation:

			9	4
➖			5	1
			4	3

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 76-25
    Solution:
    76-25 = 51
    Column vertical calculation:

			7	6
➖			2	5
			5	1

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 76-45
    Solution:
    76-45 = 31
    Column vertical calculation:

			7	6
➖			4	5
			3	1

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 48-37
    Solution:
    48-37 = 11
    Column vertical calculation:

			4	8
➖			3	7
			1	1

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 85-35
    Solution:
    85-35 = 50
    Column vertical calculation:

			8	5
➖			3	5
			5	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 72-50
    Solution:
    72-50 = 22
    Column vertical calculation:

			7	2
➖			5	0
			2	2

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>>注：本次最多计算 7 道题。

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